Could someone please tell me what this hose is for? I couldn't find it in the factory service manual. Doesn't look removable to me (I don't care to remove it anyway), but I'm curious what it is.

Thanks!

That is a drain for area below the wiper motor.

That is a drain for area below the wiper motor.

Thank you very much! You saved me the time of having to remove the wipers and that piece.

It causes corrosion on the outside (behind the fender)

Sometimes they fail and leak inside the cab too.

Leaves and other trash can get into the plenum from the grill in front of the windshield and then collect at these two drain points - resulting in rot in the plenum. When it has been good and dry for a while, consider dropping each of these hoses to check that nothing is collected in the plenum above. Another option is to remove the grill and force flush the plenum thru these drains.

thanks for the advice. i guess ill take off the grill to check!